RAW
WATER
PUMP
SERVICE
RAW
WATER
PUMP
-
PN
24143
Pump #24143 has been replaced by pump #33636. Complete
#24143 pumps are no longer assembled but their component
parts are still available.
PUMP
OVERHAUL
Disassembly
Remove the pump from the engine. The pump body is a
bronze cast unit. Its inlet and outlet hose connections are part
of
the pump housing casting.
1.
Remove the six cover plate screws along with the cover
plate and gasket.
2. Using an appropriate drift, push the impeller drive shaft
and impeller out
of
the pump housing.
3. Using circlip pliers, remove the outer circlip from the
impeller drive shaft, then remove the impeller from the
shaft.
4. Remove the key from the shaft, and the inner circlip.
5. Remove the screw holding the cam
in
the pump housing,
and remove the cam.
6. Using an appropriate puller, withdraw the outer and inner
shaft seals along with the slinger ring from the pump
body.
7. Support the pump on a press and with a lubricated drift,
push the carbon shaft bushing out
of
the pump housing.
Note the position
of
the shaft bushing
in
the housing
prior to removal.
Inspection
Examine all components and replace worn
or
damaged parts.
If the pump housing is worn internally and requires replace-
ment, we recommend that the pump assembly be replaced
with the current production pump. It
is
available
in
a replace-
ment kit,
Part #037431.
Reassembly
1. The carbon shaft bushing is a slight force fit into the
pump housing. To aide
in
the installation
of
the replace
SEAL
SLINGER
RING
ment bushing, chill the bushing
in
a freezer for 1 hour to
reduce
it's size. Prepare the pump housing
on
a press to
accept the bushing.
2. Apply some light oil to the housing boss that the bushing
will
be pressed into. Using
an
appropriate drift, push the
bushing into the housing so that
it
is flush with the
impeller housing's inner surface.
3. Using an appropriate installer, install the impeller shaft
seal. Ensure that the seal seats properly
in
the housing
and that the lip seal is positioned correctly.
4.
Place the slinger ring
in
the housing against the impeller
seal.
5. Install the impeller shaft oil seal into the housing so
it
is
flush with the housing surface. Again ensure that the lip
seal is positioned correctly.
6. Install the inner circlip on the impeller drive shaft, and
install the impeller key
in
the shaft.
7. Apply some light oil to the shaft, and with a rotating
action, slide
it
into the shaft bushing from the impeller
side and rotate
it
through the impeller seal. Locate the
slinger ring and rotate the shaft through
it.
Continue
rotating the shaft and slide
it
through the housing oil seal.
8. Install a new cam. Apply some sealant to the cam retain-
ing screw and thread
it
into the cam through the housing
and tighten
it
securely.
9. Apply a small amount
of
petroleum jelly on the housing's
inner circumference, then install the impeller onto the
shaft and into the housing. Install the
outer circlip on the
shaft.
NOTE:
The set
of
the impeller blades is
of
no
concern.
Once the
pump
is installed on the engine
and
the engine
rotated, the
bLades
will take the correct position.
10. Install the housing cover and gasket. Tighten the cover
screws securely.
IMPELLER
CAM
SCREW
RAW
WATER
PUMP
PN
24143
COVER
Engines & Generators
46
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